msem-instigator

Enchant opponent
Cards in enchanted player's graveyard lose all abilities and all names.
If enchanted player would mill one or more cards, they instead mill that many cards plus X, where X is the number of Curses attached to them.

Once each turn, when you gain life, you may exile the top card of your library. You may play that card this turn.
Whenever you cast your second spell each turn, Ignition Engine deals 2 damage to target player or planeswalker.

Ignition Point deals 3 damage to any target.
The next card you cast this turn can be cast as though it has flash.

You may have Imaginative Dreamer enter the battlefield as a copy of any creature on the battlefield. When it does, it stops being a copy.

Whenever Imako, Ninefingers becomes tapped, exile the top three cards of target opponent's library face down.
You may look at cards exiled with Imako.
Sacrifice Imako: Turn all cards exiled with it face up. Exile all cards with those names from your opponent's graveyards.

Whenever Imisti, Elven Insurgent attacks, mill two cards. When you do, you may return target land card from your graveyard to your hand.
{X}{B}{G}: If Imisti has no +1/+1 counters on it, put X +1/+1 counters on Imisti. Activate only as a sorcery.

Choose one—
• Exile target creature with power 4 or
greater.
• Exile up to four target noncreature cards from graveyards.

Whenever an opponent casts a spell during your turn or finishes drawing cards during your turn, you gain 1 life and create a Treasure token.
Sacrifice two Treasures: Draw a card.

{1}, Sacrifice a creature: Put a +1/+1 counter on Implant Scavenger and move any +1/+1 counters from the sacrificed creature onto it. It gains menace until end of turn.

Codex — Aspiring Dragon; Scrappy Hatchling; Skiviar Scraplord; Blizzard Dragon; Cloud Swine; Gold Retriever; Ilieth, Transcendent. (As this enters, conjure its contents into a shuffled face-up additional library.)
At the beginning of your upkeep, you may put a card from this codex's library on the bottom of that library.

Escalate {G} (Pay this cost for each mode chosen beyond the first.)
Choose one or both —
• Target creature you control gains deathtouch and indestructible until end of turn.
• Target creature you control fights target creature you don't control.

Whenever you cast a noncreature spell, upgrade Indecisive Sorceress. When you can't, remove all counters from it and it deals damage to any target equal to the number of counters removed this way.
• +1/+1
• Flying
• First strike

{T}: Add {U} or {R}. Spend this mana only to cast an instant, sorcery, or Wizard spell.
Whenever you cast your second spell each turn, untap Innova.

At the beginning of your upkeep, reveal the top card of your library. Any opponent may have Insurgent Ballads deal damage to them equal to that card's mana value. If a player does, put that card on the bottom of your library. Otherwise, put it into your hand.

Exile the top card of your library. Until end of turn, you may play that card. If that card is an instant or sorcery card, it costs {2} less to cast this turn.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I, II, III — Put a +1/+1 counter on target creature you control.
Double the number of counters on target creature you control.
​

Flying, trample, lifelink

When Irrigation Trawler enters the battlefield, reveal the top card of your library. If that card was a land card, put that card into your hand. Otherwise, create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

Whenever a creature you control dies, each opponent loses 1 life and you gain 1 life.
{2}{W}{B}: Ishim's Meddling becomes a 4/4 Angel creature with flying and vigilance until end of turn.

Menace
Whenever Issbarren Creeper deals combat damage to a player, draw a card, then discard a card.

If an enchanted permanent you control would leave the battlefield, instead destroy one of the Auras attached to it, then that permanent phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

All lands gain “{T}: Add one mana of any color” and lose all other abilities.

If another creature you control would die, exile it instead.
When John Furo, the Unfortunate dies, until your next end step, you may play cards exiled with John Furo.

Whenever a land enters the battlefield under your control, create a 1/1 colorless Servo artifact creature token.
{4}{G}{W}: Put a +1/+1 counter on each creature you control. They gain trample until end of turn.

Archive 3 (As this enters the battlefield, shuffle the top three cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Whenever you draw a card from the archived library, you exile up to one target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.